{"product_id":"osg-2930608-spiral-flute-tap-5-16-18-unc-ticn-vanadium-hss","title":"Osg 2930608 Spiral Flute Tap 5\/16-18 Unc Ticn Vanadium Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 2930608 is a spiral flute tap designed for cutting 5\/16-18 UNC right-hand internal threads in a wide range of metallic workpiece materials. Built from vanadium high-speed steel with a titanium carbonitride (TiCN) coating, this tap delivers improved wear resistance and lubricity compared to uncoated HSS tooling. The modified bottoming chamfer allows threading closer to the bottom of blind holes than a standard plug tap. With a 45-degree helix angle and 3 right-hand flutes, the design promotes efficient chip evacuation in through-hole and semi-blind applications. Overall length is 3.594 inches. It belongs to OSG Series 290 and carries an H2 thread limit for controlled fit tolerances. Installation is by hand tap wrench or machine tapping on CNC or drill press setups.\u003c\/p\u003e\n\u003cp\u003eThis tap is suited for production and maintenance tapping in alloy steel, carbon steel, cast iron, stainless steel, die steel, and hardened steel. The TiCN coating makes it particularly effective in abrasive or work-hardening materials where uncoated taps wear prematurely. Typical applications include threading fastener holes in machined components, fixturing, tooling plates, and general fabrication work. The modified bottoming chamfer is especially useful in blind-hole tapping where full thread depth close to the bottom of the hole is required. This tool is sold individually and is compatible with standard 5\/16-inch tap holders and collet-style tool holders.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e5\/16-18 UNC thread form with H2 thread limit for controlled tolerance fit\u003c\/li\u003e\n  \u003cli\u003eTiCN coating improves surface hardness and reduces friction for longer tool life in abrasive materials\u003c\/li\u003e\n  \u003cli\u003eVanadium high-speed steel substrate provides toughness in interrupted cuts and hard materials\u003c\/li\u003e\n  \u003cli\u003e45-degree right-hand spiral flutes promote upward chip evacuation in blind and semi-blind holes\u003c\/li\u003e\n  \u003cli\u003eModified bottoming chamfer allows threading closer to the bottom of blind holes than plug-style chamfer\u003c\/li\u003e\n  \u003cli\u003eRight-hand thread direction; no coolant-through feature required for standard tapping operations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in alloy steel, carbon steel, cast iron, stainless steel, die steel, and hardened steel workpieces. Fits standard tap wrenches and machine tap holders sized for 5\/16-inch taps with a 0.429-inch shank diameter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tap is installed by machinists and toolroom professionals using a hand tap wrench, tapping head, or rigid machine tapping setup on a drill press, mill, or CNC machining center. Ensure the workpiece is securely fixtured and the pilot hole is drilled to the correct tap drill diameter for 5\/16-18 UNC threads before tapping. Apply appropriate cutting fluid for the workpiece material, particularly when tapping stainless or hardened steel. Do not force the tap if resistance increases suddenly  -  back off to break chips and re-apply cutting fluid to avoid tap breakage.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/16-18\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Style\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 45 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Modified Bottoming\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 18\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Vanadium High-Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: TiCN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.594 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.444 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.429 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 1.972 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.238 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 290\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.05 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: OSG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 2930608\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51743141888306,"sku":"2930608","price":69.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/59ea27408fa0841f5d730ae277498004.jpg?v=1788843179","url":"https:\/\/voomisupply.com\/products\/osg-2930608-spiral-flute-tap-5-16-18-unc-ticn-vanadium-hss","provider":"Voomi Supply","version":"1.0","type":"link"}